I guess even mouthshut is not genuine while posting the reviews on its partners. My negative post about a great shopping portal called Snapdeal is not showing even after 2-3 days. I guess Snapdeal pays mouthshut for handling negative reviews this way. And it may be a way of making money for mouthshut.
I guess Mouthshut may be approaching companies that get most negative reviews and then partner with them by accepting some money. And then manipulate the negative reviews such that the partners are not affected negatively. Hope at least this negative review about mouthshut is shown:-)